Magnitude of force?

1 ⤊

Assume that during each pulse a mammalian heart accelerates 21 g of blood from 18 cm/s to 28 cm/s during a time interval of 0.10 s. Calculate the magnitude of the force (in newtons) exerted by the heart muscle on the blood.

2007-11-13 12:45:40 · 2 answers · asked by To-the-Stars 4 in Science & Mathematics ➔ Physics

2 answers

Force = mass x acceleration
acceleration = change in velocity / change in time

F = ma
a = v / t

a = (28-18) / 0.10
a = 100 cm / sec^2 or 1 meter/sec^2

F = (21/1000) x (1 )
F = 0.021 Newton

2007-11-13 14:23:05 · answer #1 · answered by bernie_bph 5 · 0⤊ 0⤋

F= m (v2-v1)/(t2-t1)
F= 0.021 (0.28 - 0.18)/ (.10)
F=0.021N

2007-11-13 13:08:52 · answer #2 · answered by Edward 7 · 1⤊ 0⤋